MotivePower is a subsidiary of Wabtec, and produces new and rebuilt locomotives at a plant in Boise, ID. In addition to their fledgling genset line, MPI produces new 3,600 and 4,000 hp commuter locomotives, and offers a line of rebuilt single engine locomotives using Detroit Diesel MTU engines. As of Sept. 2009, the company had only produced one genset - demonstrator MPEX 244 - with a second frame (tentatively referenced as MPEX 245) built but not completed. The one locomotive completed thus far was built on a new frame.

General Notes:1.Builder's info checked by Ken Lanovich in Chicago. Order number 2020-1, weight 270,000 lbs. Additional data provided in plate photo by Mike Murray. 2. Test Bed unit only, not released for outside work. The test bed was used in-plant in Boise to test the genset unit design. From an article in the Dec. 2007 issue of Trains Magazine, and other sources. Formerly an NJT GP40FH-2, no. 4133. From various sources. Rebuilt as an MP20GP when testing was completed.

Notes:A. Originally built as a GP40 by EMD. Rebuilt by MK as a GP40FH-2.Previous unit history from RRPicutureArchives and the Unofficial EMD Homepage. B.NJT 4133 was rebuilt by MK in Boise, ID as a GP40FH-2, using the frame, cab, trucks, etc. from Conrail 3067, and the cowled long hood from EMD F45 BN 6607. This odd amalgam was retired by NJT and sent back to Boise to MK's modern incarnation, MPI-Wabtec. After brief testing, it was rebuilt into an MP20GP switching unit for NJT, number NJT 1004.